Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/rvGLkoA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1d1bb096-f265-4fda-982f-ae477b2cb69c",
      "cw-6746c160-42c6-4c49-bf25-4d93d7465888"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-5c2187b8-e4aa-4a6d-858d-9ae6e4ebacd1",
    "manifestId": "https://dam.iuav.it/iuav/containers/rvGLkoA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6746c160-42c6-4c49-bf25-4d93d7465888"
  }
}